ata_intel_sata_sidpr_read
ch->hw.pm_read = ata_intel_sata_sidpr_read;
static int ata_intel_sata_sidpr_read(device_t dev, int port,
ata_intel_sata_sidpr_read(dev, port, ATA_SCONTROL, &val);
ata_intel_sata_sidpr_read(dev, port, ATA_SCONTROL, &val);